From: Pavel Machek <pavel@ucw.cz>
To: "H. Nikolaus Schaller" <hns@goldelico.com>
Cc: "Johan Hovold" <johan@kernel.org>,
afd@ti.com, "Rob Herring" <robh+dt@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Benoît Cousson" <bcousson@baylibre.com>,
"Tony Lindgren" <tony@atomide.com>,
"Russell King" <linux@armlinux.org.uk>,
"Arnd Bergmann" <arnd@arndb.de>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Kevin Hilman" <khilman@baylibre.com>,
"Andreas Färber" <afaerber@suse.de>,
"Thierry Reding" <treding@nvidia.com>,
"Jonathan Cameron" <jic23@kernel.org>,
"Noralf Trønnes" <noralf@tronnes.org>,
"David Lechner" <david@lechnology.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-omap@vger.kernel.org, letux-kernel@openphoenux.org,
kernel@pyra-handheld.com, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v7 3/6] DTS: gta04: add uart2 child node for w2sg0004 GPS receiver
Date: Thu, 14 Jun 2018 21:44:38 +0200 [thread overview]
Message-ID: <20180614194428.GA17808@amd> (raw)
In-Reply-To: <9ebb28aed589aca8e9b5bc5c910f1d2f0d62669d.1525340143.git.hns@goldelico.com>
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On Thu 2018-05-03 11:35:48, H. Nikolaus Schaller wrote:
> GTA04 has a W2SG0004 module connected to UART2 of the OMAP3
> processor. A GPIO can pulse the on/off toggle switch.
>
> Note that there is no WAKEUP output from the W2SG0004,
> hence we can't use the generic SirfStar binding.
>
> The VSIM regulator is used to power on/off the LNA of an
> external active GPS antenna so that a driver can turn the
> LNA off if GPS is not needed to save battery energy.
This reads as if you did low->high->low to turn GPS on, then
low->high->low to turn GPS off again. Is that correct?
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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From: pavel@ucw.cz (Pavel Machek)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v7 3/6] DTS: gta04: add uart2 child node for w2sg0004 GPS receiver
Date: Thu, 14 Jun 2018 21:44:38 +0200 [thread overview]
Message-ID: <20180614194428.GA17808@amd> (raw)
In-Reply-To: <9ebb28aed589aca8e9b5bc5c910f1d2f0d62669d.1525340143.git.hns@goldelico.com>
On Thu 2018-05-03 11:35:48, H. Nikolaus Schaller wrote:
> GTA04 has a W2SG0004 module connected to UART2 of the OMAP3
> processor. A GPIO can pulse the on/off toggle switch.
>
> Note that there is no WAKEUP output from the W2SG0004,
> hence we can't use the generic SirfStar binding.
>
> The VSIM regulator is used to power on/off the LNA of an
> external active GPS antenna so that a driver can turn the
> LNA off if GPS is not needed to save battery energy.
This reads as if you did low->high->low to turn GPS on, then
low->high->low to turn GPS off again. Is that correct?
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2018-06-14 19:44 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-03 9:35 [PATCH v7 0/6] gnss: special driver for Wi2Wi w2sg0004 GPS module on GTA04 board H. Nikolaus Schaller
2018-05-03 9:35 ` H. Nikolaus Schaller
2018-05-03 9:35 ` [PATCH v7 1/6] dt-bindings: define vendor prefix for Wi2Wi, Inc H. Nikolaus Schaller
2018-05-03 9:35 ` H. Nikolaus Schaller
2018-05-07 20:54 ` Rob Herring
2018-05-07 20:54 ` Rob Herring
2018-05-08 6:41 ` H. Nikolaus Schaller
2018-05-08 6:41 ` H. Nikolaus Schaller
2018-05-03 9:35 ` [PATCH v7 2/6] dt-bindings: gnss: add w2sg0004 bindings documentation H. Nikolaus Schaller
2018-05-03 9:35 ` H. Nikolaus Schaller
2018-05-03 9:35 ` [PATCH v7 3/6] DTS: gta04: add uart2 child node for w2sg0004 GPS receiver H. Nikolaus Schaller
2018-05-03 9:35 ` H. Nikolaus Schaller
2018-06-14 19:44 ` Pavel Machek [this message]
2018-06-14 19:44 ` Pavel Machek
2018-06-16 15:37 ` H. Nikolaus Schaller
2018-06-16 15:37 ` H. Nikolaus Schaller
2018-05-03 9:35 ` [PATCH v7 4/6] misc gnss serdev: Add w2sg0004 power control driver H. Nikolaus Schaller
2018-05-03 9:35 ` H. Nikolaus Schaller
2018-05-03 9:35 ` [PATCH v7 5/6] gnss: add w2sg0004 to Makefile H. Nikolaus Schaller
2018-05-03 9:35 ` H. Nikolaus Schaller
2018-05-03 9:35 ` [PATCH v7 6/6] gnss: add w2sg0004 to Kconfig H. Nikolaus Schaller
2018-05-03 9:35 ` H. Nikolaus Schaller
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